ABSTRACT

An approximate first-power relationship was found between the maximum vertical component of ground displacement and the charge size from a number of quarry shots. The maximum vertical ground displacement, normalized to the Rainier (1.7 kt.) underground nuclear shot, is presented for a series of explosive shots ranging in size from 1 ton 19 kilotons and at distances of 1 to nearly 1,000 kilometers. The following empirical equations were found to fit the observed data: